<?php
/**
 * Zend Framework
 * LICENSE
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 * @category Zend
 * @package Zend_Validate
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 * @version $Id: ExcludeExtension.php 24593 2012-01-05 20:35:02Z matthew $
 */
/**
 *
 * @see Zend_Validate_Abstract
 */
require_once 'Zend/Validate/File/Extension.php';

/**
 * Validator for the excluding file extensions
 * @category Zend
 * @package Zend_Validate
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 */
class Zend_Validate_File_ExcludeExtension extends Zend_Validate_File_Extension {

    /**
     * @const string Error constants
     */
    const FALSE_EXTENSION = 'fileExcludeExtensionFalse';

    const NOT_FOUND = 'fileExcludeExtensionNotFound';

    /**
     *
     * @var array Error message templates
     */
    protected $_messageTemplates = array(self::FALSE_EXTENSION => "File '%value%' has a false extension", self::NOT_FOUND => "File '%value%' is not readable or does not exist");

    /**
     * Defined by Zend_Validate_Interface
     * Returns true if and only if the fileextension of $value is not included in the
     * set extension list
     * @param string $value Real file to check for extension
     * @param array $file File data from Zend_File_Transfer
     * @return boolean
     */
    public function isValid ($value, $file = null) {
        // Is file readable ?
        require_once 'Zend/Loader.php';
        if ( ! Zend_Loader::isReadable ($value)) {
            return $this -> _throw ($file, self::NOT_FOUND);
        }
        if ($file !== null) {
            $info['extension'] = substr ($file['name'], strrpos ($file['name'], '.') + 1);
        } else {
            $info = pathinfo ($value);
        }
        $extensions = $this -> getExtension ();
        if ($this -> _case and ( ! in_array ($info['extension'], $extensions))) {
            return true;
        } else 
            if ( ! $this -> _case) {
                $found = false;
                foreach ($extensions as $extension) {
                    if (strtolower ($extension) == strtolower ($info['extension'])) {
                        $found = true;
                    }
                }
                if ( ! $found) {
                    return true;
                }
            }
        return $this -> _throw ($file, self::FALSE_EXTENSION);
    }

}
